package com.sky.service.impl;

import com.sky.dto.GoodsSalesDTO;
import com.sky.entity.Orders;
import com.sky.entity.User;
import com.sky.mapper.OrderMapper;
import com.sky.service.ReportService;
import com.sky.service.WorkspaceService;
import com.sky.vo.*;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;
import java.io.InputStream;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
@Slf4j
public class ReportServiceImpl implements ReportService {



    @Autowired
    private OrderMapper orderMapper;
    @Autowired
    private WorkspaceService workspaceService;

    public TurnoverReportVO getTurnoverStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        dateList.add(begin.plusDays(1));
        while(!begin.equals(end)) {
            //日期计算，计算指定日期后一天对应日期
            begin= begin.plusDays(1);
            dateList.add(begin);
        }

        //存储每天营业额
        List<Double> turnoverList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期对应的营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            map.put("status", Orders.COMPLETED);
            Double turnover = orderMapper.sumByMap(map);
            turnover = turnover == null? 0.0 : turnover;
            turnoverList.add(turnover);
        }


        //封装返回结果
        return TurnoverReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .turnoverList(StringUtils.join(turnoverList,","))
                .build();
    }

    @Override
    public UserReportVO getUserStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        dateList.add(begin.plusDays(1));
        while(!begin.equals(end)) {
            //日期计算，计算指定日期后一天对应日期
            begin= begin.plusDays(1);
            dateList.add(begin);
        }

        //存储每天营业额
        List<Integer> UserList = new ArrayList<>();
        List<Integer> newUserList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询date日期对应的营业额
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);

            Map map = new HashMap();
            map.put("begin",beginTime);
            map.put("end",endTime);
            Integer total = orderMapper.sumByUsersMap(map);
            total = total == null? 0 : total;
            UserList.add(total);

            LocalDate date2 = date.plusDays(-1);
            LocalDateTime beginTime2 = LocalDateTime.of(date2, LocalTime.MIN);
            LocalDateTime endTime2 = LocalDateTime.of(date2, LocalTime.MAX);
            Map map2 = new HashMap();
            map2.put("begin",beginTime2);
            map2.put("end",endTime2);

            Integer total2 = total - orderMapper.sumByUsersMap(map2);
            newUserList.add(total2);
        }


        return UserReportVO
                .builder()
                .dateList(StringUtils.join(dateList,","))
                .totalUserList(StringUtils.join(UserList,","))
                .newUserList(StringUtils.join(newUserList,","))
                .build();
    }

    @Override
    public OrderReportVO getOrdersStatistics(LocalDate begin, LocalDate end) {
        List<LocalDate> dateList = new ArrayList<>();
        dateList.add(begin);
        dateList.add(begin.plusDays(1));
        while(!begin.equals(end)) {
            //日期计算，计算指定日期后一天对应日期
            begin= begin.plusDays(1);
            dateList.add(begin);
        }

        List<Integer> orderCountList = new ArrayList<>();
        List<Integer> validOrderCountList = new ArrayList<>();
        for (LocalDate date : dateList) {
            //查询每天订单总数
            LocalDateTime beginTime = LocalDateTime.of(date, LocalTime.MIN);
            LocalDateTime endTime = LocalDateTime.of(date, LocalTime.MAX);
            Integer orderCount = getOrderCount(beginTime, endTime, null);
            //查询每天有效订单数
            Integer validOrderCount = getOrderCount(beginTime, endTime, Orders.COMPLETED);
            orderCountList.add(orderCount);
            validOrderCountList.add(validOrderCount);

        }
        //计算时间区间的订单总数量
        Integer totalOrderCount = orderCountList.stream().reduce(Integer::sum).get();

        //计算时间区间内的有效订单数量
        Integer validTotalOrderCount = validOrderCountList.stream().reduce(Integer::sum).get();

        //计算订单完成率
        Double orderCompletionRate = 0.0;
        if(totalOrderCount != 0 ) {
         orderCompletionRate = validTotalOrderCount.doubleValue() / totalOrderCount.doubleValue();
        }
        OrderReportVO orderReportVO = OrderReportVO.builder()
                .dateList(StringUtils.join(dateList, ","))
                .orderCountList(StringUtils.join(orderCountList, ","))
                .validOrderCountList(StringUtils.join(validOrderCountList, ","))
                .orderCompletionRate(orderCompletionRate)
                .build();
        return orderReportVO;
    }

    @Override
    public SalesTop10ReportVO getSalesTop10(LocalDate begin, LocalDate end) {
        LocalDateTime beginTime = LocalDateTime.of(begin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(end, LocalTime.MAX);

        List<GoodsSalesDTO> salesTop = orderMapper.getSalesTop(beginTime, endTime);
        List<String> names = salesTop.stream().map(GoodsSalesDTO::getName).collect(Collectors.toList());
        String nameList = StringUtils.join(names, ",");

        List<Integer> number = salesTop.stream().map(GoodsSalesDTO::getNumber).collect(Collectors.toList());
        String numberList = StringUtils.join(number,",");


        return SalesTop10ReportVO
                .builder()
                .numberList(numberList)
                .nameList(nameList)
                .build();
    }

    @Override
    public void exportBusinessData(HttpServletResponse response) {
        //查询数据库数据--30天
        LocalDate dateBegin = LocalDate.now().minusDays(30);
        LocalDate dateEnd = LocalDate.now().minusDays(1);

        LocalDateTime beginTime = LocalDateTime.of(dateBegin, LocalTime.MIN);
        LocalDateTime endTime = LocalDateTime.of(dateEnd, LocalTime.MAX);

        BusinessDataVO businessDataVO = workspaceService.getBusinessData(beginTime, endTime);
        //通过POI写入excel文件中
        InputStream in = this.getClass().getClassLoader().getResourceAsStream("template/运营数据报表模板.xlsx");
        try {
            XSSFWorkbook excel = new XSSFWorkbook(in);
            //填充数据--时间
            XSSFSheet sheet = excel.getSheet("Sheet1");
            XSSFRow row = sheet.getRow(1);
            row.getCell(1).setCellValue("时间"+beginTime+"至"+endTime);

            row = sheet.getRow(3);
            row.getCell(2).setCellValue(businessDataVO.getTurnover());
            row.getCell(4).setCellValue(businessDataVO.getOrderCompletionRate());
            row.getCell(6).setCellValue(businessDataVO.getNewUsers());

            //获得第五航
            row = sheet.getRow(4);
            row.getCell(2).setCellValue(businessDataVO.getValidOrderCount());
            row.getCell(4).setCellValue(businessDataVO.getUnitPrice());

            for (int i = 0; i < 30; i++) {
                LocalDate date = dateBegin.plusDays(i);
                BusinessDataVO businessData = workspaceService.getBusinessData(LocalDateTime.of(date, LocalTime.MIN), LocalDateTime.of(date, LocalTime.MAX));

                //获得某一行
                row = sheet.getRow(7 + i);
                row.getCell(1).setCellValue(date.toString());
                row.getCell(2).setCellValue(businessData.getTurnover());
                row.getCell(3).setCellValue(businessData.getValidOrderCount());
                row.getCell(4).setCellValue(businessData.getOrderCompletionRate());
                row.getCell(5).setCellValue(businessData.getUnitPrice());
                row.getCell(6).setCellValue(businessData.getNewUsers());
            }


            //通过输出流将excel文件下载到客户端浏览器
            ServletOutputStream out = response.getOutputStream();
            excel.write(out);

            out.close();
            excel.close();

        } catch (IOException e) {
            throw new RuntimeException(e);
        }



    }

    private Integer getOrderCount(LocalDateTime begin, LocalDateTime end,Integer status){
        Map map = new HashMap();
        map.put("begin",begin);
        map.put("end",end);
        map.put("status",status);

        return orderMapper.countByMap(map);

    }
}
